Shear induced formation and destruction behavior of conductive networks in nickel/polyurethane composites during strain sensing

Tian, Ke; Pan, Qinjun; Deng, Hua; Fu, Qiang

doi:10.1016/j.compositesa.2019.105757

Cited by 28 publications

(9 citation statements)

References 37 publications

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“…In this work, a series of bending radii, 1, 1.5, 2, 2.5, ..., 5 cm, were selected, which yield the bending-induced strain of around 1.75%. For Ni particle-dispersed TPU composites, we found an unconventional stretch-induced resistivity-drop phenomenon previously, which has been systemically illustrated elsewhere . In this work, the resistance response to tensile strain for the proposed TPV/Ni film is also investigated, as shown in Figure S6.…”

Section: Results and Discussionsupporting

confidence: 64%

“…For Ni particle-dispersed TPU composites, we found an unconventional stretch-induced resistivity-drop phenomenon previously, which has been systemically illustrated elsewhere. 40 In this work, the resistance response to tensile strain for the proposed TPV/Ni film is also investigated, as shown in Figure S6. The variation in the resistivity in both length-wise direction and thickness direction was recorded in the strain range of 0−2%, which shows a tendency of enormous exponential decline as the introduction of tensile strain in both directions.…”

Section: Resultsmentioning

confidence: 99%

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Ultrasensitive Thin-Film Pressure Sensors with a Broad Dynamic Response Range and Excellent Versatility Toward Pressure, Vibration, Bending, and Temperature

Tian

Sui

Yang

et al. 2020

ACS Appl. Mater. Interfaces

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Flexible pressure sensors with high sensitivity and wide pressure response range are attracting considerable research interest for their potential applications as e-skins. Nowadays, it seems a dilemma to realize high-performance, multifunctional pressure sensors with a cost-effective, scalable strategy, which can simplify wearable sensing systems without additional signal processing, enabling device miniaturization and low power consumption. Herein, pressure sensors with ultrahigh sensitivity and a broad response pressure range are developed with a low-cost, facile method by combining strain-induced percolation behavior and contact area contributions. Because of their special surface structure and strain-induced conductive network formation behavior, these unique pressure sensors exhibit wide sensing range of 1 Pa to 500 kPa, ultrahigh sensitivity (1 × 106 and 3.1 × 104 kPa–1 in the pressure ranges of 1 Pa to 20 kPa and 20–500 kPa, respectively), fast signal response (<50 ms), low detection limit (1 Pa), and high stability over 500 loading/unloading cycles. These characteristics allow the devices to work as e-skins to monitor human pulse signals and finger touch. Moreover, these sensors illustrate precise electrical response to mechanical vibration, bending, and temperature stimuli, which afford the ability of detecting cell phone call-in vibration signals, joint bending, spatial pressure, and temperature distributions, indicating promising applications in next-generation wearable, multifunctional e-skins.

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Section: Results and Discussionsupporting

confidence: 64%

Section: Resultsmentioning

confidence: 99%

Ultrasensitive Thin-Film Pressure Sensors with a Broad Dynamic Response Range and Excellent Versatility Toward Pressure, Vibration, Bending, and Temperature

Tian

Sui

Yang

et al. 2020

ACS Appl. Mater. Interfaces

Self Cite

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“…Average diameter of 2.5 µm, 50 µm, 100 µm with the density of around 3.6, 2.6 and 2.5 g/cm 3 , respectively Graphite nanoplates (GNPs) xGnP ® Grade M Average particle diameters of 15 µm, density 2.2 g/cm 3 , carbon content >99.5%…”

Section: Conductive Fillermentioning

confidence: 99%

“…Benefiting from a large variety of polymer matrices and conductive fillers available, conductive polymer composites (CPCs) can be easily fabricated with desired properties, fulfilling a broad spectrum of requirements in various applications. By combining different polymer matrices and conductive fillers, not only the electrical and mechanical properties of CPCs can be tuned and tailored to specific target requirements, but other functionalities can also be introduced such as sensitivity to a number of external stimuli including strain [1][2][3], humidity [4], temperature [5][6][7], liquid [8] and damage [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

The effect of conductive network on positive temperature coefficient behaviour in conductive polymer composites

Liu

Asare

Porwal³

et al. 2020

Composites Part A: Applied Science and Manufacturing

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“…With the rapid development of functional and intelligent devices, there is an increasing demand for new materials, which can respond to external stimuli like strain [ 1 ] humidity [ 2 ], damage [ 3 ], or temperature [ 4 ]. Combining different polymers with conductive fillers, electrical, mechanical, or chemical properties can be tailored and tuned for the desired requirements.…”

Section: Introductionmentioning

confidence: 99%

Enhanced PTC Effect in Polyamide/Carbon Black Composites

et al. 2022

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Self-heating nanocomposites with a positive temperature coefficient (PTC) provide outstanding potential for a broad range of engineering applications in automobile, spacecraft, or smart building. Therefore, extensive studies have been carried out to understand thermo-electrical behavior. However, some controversies remain, especially on the material composition, to clarify influencing factors on the PTC performance. In this study, the thermo-electrical behaviors of injection molded carbon black (CB)/polyamide (PA) nanocomposites have been investigated. Three types of CB with well-defined specific surface area and polyamides with high and low crystallinity were selected to provide a guideline for self-heating devices including PTC-Effects. Significantly reduced specific resistances up to 2.7 Ω·cm were achieved by incorporating CB with a high specific surface area into a highly crystalline PA. Noticeable PTC-Effects of ~53% and average surface temperatures up to 147 °C have been observed due to self-heating, which confirms a promising material performance as a heating device.

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Shear induced formation and destruction behavior of conductive networks in nickel/polyurethane composites during strain sensing

Cited by 28 publications

References 37 publications

Ultrasensitive Thin-Film Pressure Sensors with a Broad Dynamic Response Range and Excellent Versatility Toward Pressure, Vibration, Bending, and Temperature

Ultrasensitive Thin-Film Pressure Sensors with a Broad Dynamic Response Range and Excellent Versatility Toward Pressure, Vibration, Bending, and Temperature

The effect of conductive network on positive temperature coefficient behaviour in conductive polymer composites

Enhanced PTC Effect in Polyamide/Carbon Black Composites

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